Hercynite
Lavina B, Princivalle F, Della Giusta A
Physics and Chemistry of Minerals 32 (2005) 83-88
Controlled time-temperature oxidation reaction in a synthetic Mg-hercynite
Spinel structure
Sample: Annealing temperature and time T = 600 C, t = 1842 h
_database_code_amcsd 0008952
8.0975 8.0975 8.0975 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ   Uiso
AlA    .125   .125   .125  .27  .0085
Fe2+A  .125   .125   .125  .15  .0085
Fe3+A  .125   .125   .125  .33  .0085
MgA    .125   .125   .125  .21  .0085
AlB      .5     .5     .5  .77  .0073
Fe2+B    .5     .5     .5 .025  .0073
Fe3+B    .5     .5     .5  .10  .0073
MgB      .5     .5     .5  .04  .0073
O    .26029 .26029 .26029      .01185